Claude Code on the web runs Claude Code in a managed cloud sandbox instead of on my local machine. Here are some wrinkles I’ve run into.

System prompt has extra text for cloud environments

When running in this managed remote execution environment, the system prompt includes this extra sentence:

You are running Claude Code in a managed remote execution environment, in the cloud rather than on the user’s machine.

This is useful to know if I’m debugging prompt-dependent behavior, since it can differ from a local Claude Code session.

Detecting it from scripts

Scripts can detect that they’re running in Claude Code on the web by checking for the CLAUDE_CODE_REMOTE=true environment variable.